Cylinder and piston for internal-combustion motors



E. H. CROSSEN.

CYLINDER AND PISTON FOR INTERNAL COMBUSTION MOTORS. APPLICATION FILED SEPT- 20, I919.

1 ,37 1,225, Patented Mar. 15', 1921.

INVENTOR EDGAR H. 650555 N BY W AT TORNE-Y EDGAR H. CROSSEN, OF FRANKLIN, PENNSYLVANIA.

CYLINDER AND PISTON FOR INTERNAL-COMBUSTION MOTORS.

, Specification of Letters I atent.

Patented Mar. 15, 1921.

Application filed September 20, 1919. Serial No. 325,194.

To all w 710m it may concern Be it known that I, EDGAR II. CRossEN, citizen of the United States, residing at Franklin, in the county of Venango and State of Pennsylvania, have invented certain new and useful Improvements in Cylinders and Pistons for Internal-Combustion Motors, of which the following is a specification.

This invention has for its object, to confine the water that is introduced into the cylinder of an internal combustion engine to certain areas, and to so direct the course of same as it enters the cylinder, that it will not be deposited upon large areas of the cylinder walls and the surface of the piston, where, to a certain extent, it washes off the lubricant, and thereby interferes with the proper lubrication of the engine.

For the attainment of this object I have devised the construction shown in the accompanying drawings, the figures of which are as follows:

Figure 1 is a transverse section of the cylinder of an engine taken on line I-I of Fig. 2 and equipped in accordance with my invention.

Fig. 2 is a vertical longitudinal section of said cylinder.

The cylinder here shown is constructed as shown and described in my application for Letters Patent of the United States Serial No. 297,684 dated May 16, 1919, for oil en: gines, and is equipped with the atomizer shown and described in my application for Letters Patent of the United States, Serial No. 297688, filed May 16, 1919, for an atommen The construction shown in said drawings is as follows:

This engine is of the two-cycle, three-port type and the cylinder 1 is provided with a pump-chamber 2, and an expansion chamber 3, which are connected by a piston-controlled transfer passage 1. An atomizer 5 (shown and described in said application Serial No. 297683) supplies water to said transfer port 4 and is drawn into said passage by the inductive action of the piston 6 at the same time air is drawn into the pump chamber.

Heretofore, the transfer passage 4. has been of uniform and equal area throughout its extent, and as the water entered same it was free to pass into the pump chamber 2 and to be deposited to some extent upon the surface of the piston, thus tending to wash the lubricating oil therefrom. I have discovered that this action of the water may be prevented by placing at the pump chamber end of said passage 4:, an upwardly-projecting bafliei; this bafiie serves to intercept the water, and prevent it from passing over into said pump chamber and confines it, while it is entering the cylinder to said passage 4. When the air is being transferred from the pump chamber to the expansion chamber, the water, or spray in said passage is swept therewith into said expansion-chamber 3.

In order to immediately and closely direct, or deflect said spray toward the rear of the expansion chamber 3, I form in the head of the piston 6 a deflecting feature or pocket 8 of substantially the same width as port 4 of the transfer passage 4. The pocket 8, it will be readily noted, is quite narrow, as compared with the diameter of the piston. This comparatively narrow extent of said deflecting pocket, serves to confine the air and the water carried thereby to a narrow path until it strikes the rear wall of the expansion chamber, by this time said water is converted into steam and does not, therefore, become deposited upon the wall of the cylinder in such a state or quantity as to interfere with lubrication.

Heretofore the deflecting feature 8 of the piston has been made much broader than the adjacent port 4 of the transfer passage with which it cooperates, thus permitting the incoming spray to spread out and deposit, in the form of water upon the walls of the expansion chamber 3, and thus, to a certain extent, lessen the lubricating efficiency of the lubricant there present. The construction shown lessens, to a large extent, this undesirable condition, and does not, to any appreciable extent lessen the desired effect for which the water spray is employed.

I am aware that it is not new to supply water to the combustion chamber of an internal combustion motor, and it is not my purpose to broadly claim means for accomplishing this object, but only to claim the combination of a cylinder and a piston, so constructed, combined and operating as to introduce the water ina certain way, a precise definition of my invention being expressed in the appended claims.

I claim the following:'

1. A cylinder for internal combustion motors comprising a pump chamber, an expan- I V a a i,a'?i,228

ing' a pump chamber, an expansion chamber, 7 and an mtercommumcatmg passage between said chambers adapted to have water supplied thereto 2 a water baflie in said passage specified.

intermediate the point of water supply and the pump chamber end thereof; said piston being supplied With a deflecting feature comprising a pocket adapted to cooperate with the combustion-chamber port of said transfer passage, and substantially coinciding in width therewith, for the purpose In testimony whereof I aflix my signature in presence of two witnesses.

EDGAR H. GROSSEN. Witnesses: if

E.v M. PAT ERSON, R. CowIN. 

